If you don't know what I'm talking about, on mturk, a PANDA is link that will automatically accept a HIT. It's short for "Preview AND Accept," which is the kind of link you get if you click the "automatically accept next HIT" checkbox from an active HIT. (I'm butchering this explanation, but it's common enough that if you google it, you'll find tons of detailed posts about how to use PANDA links.)
So anyway, you can accept up to 25 HITs (until they expire), so it's kinda a common thing to use a PANDA link for popular batches. Basically, you're just grabbing as many of them as you can before they all disappear. If you worked them one by one (waiting until you completed one to accept another), you might not be able to get as many.
But since I've been more of a casual turker, I didn't really try anything with PANDA links until recently. And in the last few days, I've bee playing with opening a PANDA link in a separate tab or window, then auto-refreshing that tab while I work from my "Hits Assigned To You" queue.
And that's what I was doing his morning when I started turking at my house. Then my Internet connection went down. I knew I had a few HITs that would expire if I didn't get to them within an hour or so, so I decided to head to my office to work there for a while. Cleaned up the few HITs I had accepted from home, opened a new PANDA window, and kept working away. A few hours later, I closed my PANDA window so I could finish up what I had accepted and then go to lunch.
But the HITs kept coming.
It didn't make sense... until I realized that my home Internet must have come back up... and I never closed the PANDA tab there... Oops! Felt like the classic I Love Lucy scene in the chocolate factory!